Biodegradable polylactic acid agricultural mulching film and processing technology thereof

An agricultural mulch film and biodegradable technology, which is applied in horticulture, application, plant protection, etc., can solve the problems of reducing the film’s permeability to visible light, poor transparency of visible light, and easy seepage stability, etc., and achieve good visible light transmission. Excellent UV shielding effect, enhanced effect of UV shielding effect

Active Publication Date: 2018-10-23
湖北嘉鑫环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic UV shielding agent has the disadvantages of toxicity, easy oozing and poor stability, and the inorganic UV shielding agent has the disadvantages of large amount of addition and poor transparency of visible light.
In addition, although some ultraviolet shielding agents can improve the ultraviolet shielding ability of polylactic acid films, they will reduce the permeability of the film to visible light at the same time.

Method used

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  • Biodegradable polylactic acid agricultural mulching film and processing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Processing of polylactic acid film:

[0028] (1) Dry 12kg polylactic acid resin in an oven at 80-90°C to constant weight;

[0029] (2) The dried polylactic acid resin and 1.5kg light calcium carbonate, 1kg polypropylene carbonate, 0.5kg carboxymethyl-β-cyclodextrin, 0.5kg PEG-60 hydrogenated castor oil, 0.3kg hexahydroxy Add methylmelamine hexamethyl ether, 0.2kg ultraviolet shielding agent nano-zinc oxide, and 0.08kg antioxidant 1010 into a high-speed mixer, and mix at a high speed of 300r / min for 5min to obtain the mixture;

[0030] (3) Add the above-mentioned mixture into a twin-screw extruder, and cool and granulate after melt extrusion to obtain polylactic acid masterbatch. The temperature in the first zone is 175-180°C, the temperature in the second zone is 180-185°C, The zone temperature is 185-190°C, the tenth zone temperature is 180-185°C, the residence time of the entire extrusion process is 5min, and the pressure is 50MPa;

[0031] (4) Add the prepared poly...

Embodiment 2

[0033] Processing of polylactic acid film:

[0034] (1) Dry 12kg polylactic acid resin in an oven at 80-90°C to constant weight;

[0035] (2) The dried polylactic acid resin and 1.5kg light calcium carbonate, 1kg polypropylene carbonate, 0.5kg carboxymethyl-β-cyclodextrin, 0.5kg PEG-60 hydrogenated castor oil, 0.3kg hexahydroxy Add methyl melamine hexamethyl ether, 0.2kg ultraviolet shielding agent nano-titanium dioxide, and 0.08kg antioxidant 1010 into a high-speed mixer, and mix at a high speed of 300r / min for 5min to obtain the mixture;

[0036] (3) Add the above-mentioned mixture into a twin-screw extruder, and cool and granulate after melt extrusion to obtain polylactic acid masterbatch. The temperature in the first zone is 175-180°C, the temperature in the second zone is 180-185°C, The zone temperature is 185-190°C, the tenth zone temperature is 180-185°C, the residence time of the entire extrusion process is 5min, and the pressure is 50MPa;

[0037] (4) Add the prepar...

Embodiment 3

[0039] Processing of polylactic acid film:

[0040] (1) Dry 12kg polylactic acid resin in an oven at 80-90°C to constant weight;

[0041] (2) The dried polylactic acid resin and 1.5kg light calcium carbonate, 1kg polypropylene carbonate, 0.5kg carboxymethyl-β-cyclodextrin, 0.5kg PEG-60 hydrogenated castor oil, 0.3kg hexahydroxy Methyl melamine hexamethyl ether, 0.2kg ultraviolet shielding agent, 0.08kg antioxidant 1010 were added in the high-speed mixer, and mixed at a high speed of 300r / min for 5min to obtain the mixture;

[0042] (3) Add the above-mentioned mixture into a twin-screw extruder, and cool and granulate after melt extrusion to obtain polylactic acid masterbatch. The temperature in the first zone is 175-180°C, the temperature in the second zone is 180-185°C, The zone temperature is 185-190°C, the tenth zone temperature is 180-185°C, the residence time of the entire extrusion process is 5min, and the pressure is 50MPa;

[0043] (4) Add the prepared polylactic aci...

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Abstract

The invention discloses a biodegradable polylactic acid agricultural mulching film and a processing technology thereof, and relates to the technical field of agricultural mulching films. The biodegradable polylactic acid agricultural mulching film is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic resin, 15-30 parts of light calcium carbonate, 5-10 parts of polypropylene carbonate, 5-10 parts of carboxymethyl-beta-cyclodextrin, 1-5 parts of PEG-60 hydrogenated castor oil, 1-5 parts of hexakis(methoxymethyl)melamine, 1-5 parts of ultraviolet screening agent and 0.5-2 parts of antioxidant. According to the biodegradable polylactic acid agricultural mulching film and the processing technology thereof, the polylactic acid film is prepared by taking thepolylactic resin as a main material and co-taking a plurality of auxiliary materials, and the prepared polylactic acid film belongs to the biodegradable film and is non-toxic, harmless and strong inuse environmental protection property; and in addition, the usability is excellent, and the use requirement of the agricultural mulching film is met.

Description

Technical field: [0001] The invention relates to the technical field of agricultural mulching films, in particular to a biodegradable polylactic acid agricultural mulching film and a processing technology thereof. Background technique: [0002] Polylactic acid is a non-toxic, easy-to-process, and fully biodegradable polymer. It has good chemical inertness and good biocompatibility, and can be used in fields such as films, plastics, and fibers. Polylactic acid film has great application potential in agricultural mulch film, commodity packaging film, garbage bag and electronic screen protection film, etc., but the defect of polylactic acid film has poor ultraviolet shielding performance, which limits its use in agricultural mulch film to a certain extent. Applications. [0003] At present, the method to improve the ultraviolet shielding performance of polylactic acid film is mainly to add ultraviolet shielding agent. Ultraviolet shielding agents can be divided into two categ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L5/08C08K13/06C08K9/12C08K3/22C08K3/26C08K5/526C08K5/134C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/04C08J2405/08C08J2469/00C08K5/1345C08K5/526C08K9/12C08K13/06C08K2003/2241C08K2003/2296C08K2003/265C08K2201/011Y02A40/28
Inventor 汪六一
Owner 湖北嘉鑫环保新材料科技有限公司
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